Only return entries that match the filter. By default all entries are returned.

If the sub reference returns true the entry will be kept, otherwise it's skipped and the next line in the file is parsed. The current entry is provided to the sub as a hash reference (its parsed form) via the $_ variable:

Expand all "expandable" entries, or just the "expandable" entries named in the array reference. Defaults to 0, no entries are expanded.

A few types of log entries have cryptic fields. This option will expand these to something you can understand without having to refer to the NcFTPd docs. A value of 1 will expand all "expandable" fields, 0 will not expand any. You can also provide an ARRAY ref containing fields to expand.